the capacity of the plant was increased, and operations were resumed in January, 1904.
The Lexington Hill Gold Mining Company, a new company, made its initial production, operating an old mill on Spruce Gulch, which was included in the sale of ground to them. Nearly 100 tons a day were treated while the mill was in operation. At the Lucky Strike mine the shaft is being continued to a depth of 200 feet, following the vein from the surface. The triple-compartment shaft on the Oro Hondo was sunk 500 feet lower during 1903, and a drift was started at the 600-foot level. A new hoist was erected at the Pennsylvania and sinking was resumed. The Penobscot increased its production quite materially, operating a 125-ton cyanide plant continuously, and shipping between 50 and 100 tons per day to the smelter. At the Pluma mine development work was carried on extensively during the time that work on the new mill was stopped, pending settlement of litigation. The company is at present cross-cutting at the 300-foot and the 500-foot levels. The former cross-cut has been run 630 feet and the latter 100 feet. A considerable amount of ore has been brought down awaiting completion of the cyanide plant for treatment.
The Reliance Mining and Milling Company, a consolidation of several other large companies, started active operations, and was engaged in erecting a 300-ton plant. At the Ruby Gold Mining and Milling Company's property the new mill is about completed. The Spearfish Company operated steadily during the year, making regular clean ups. At one time during the year the company held an option on the Deadwood Standard group, but finally gave it up. A new 12-drill compressor was purchased, and preparations were made to increase the capacity of the mill. Plans were completed for erecting a new plant at the Tinton Mining Company's property. The Two Johns Companjstarted to unwater its shaft, preparatory to resuming operations. The Wasp Number Two operated steadily during 1903, with the exception of four days. This was the longest shut down since the company started, and was caused Dy needed repairs. The Wasp was one of the mines that quarried the quartzite.
Among the new organizations formed in 1903 the following have carried on continuous development: The Aurizone Mining Company, Columbia Commercial Gold Mining and Milling Company, Gilt Edge Maid Mining Company, Gold Copper Mining and Development Company, Gold Eagle Mining Company, Gold Stake Mining Company, Leo Mining Company, and the United Ruby Gold Mining Company.
Among companies installing new machinery and not mentioned previously are: the Elliptic, the Rex, the Gladiator Consolidated, the Tintanic, and the Wanconda.
Pennington County. The Black Hills and Duluth Copper Company, after prospecting the greater part of the year with a diamond drill,
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